Table 2 The flow variation (%) that are critical for the N-P-K sign of the nationwide balance.
N | P | K | ||
|---|---|---|---|---|
Outputs | Harvests (Ho) | −30% | 417% | 41% |
Cropped or grazed straw (So) | −61% | 806% | 32% | |
Cropped or grazed weeds - crops (Wo) | −28% | 662% | 20% | |
Cropped or grazed weeds - fallow (Go) | −40% | 912% | 28% | |
Woody crops pruning (Po) | (−100%) | 7176% | 220% | |
Leaching and runoff (Lo) | −60% | — | 52% | |
Erosion (Eo) | — | 692% | 76% | |
N emissions (Vo) | −22% | — | — | |
Inputs | Seeds (Si) | 308% | (−100%) | (−100%) |
Manure (Mi) | 41% | (−100%) | −41% | |
Field excretions (Ei) | 38% | (−100%) | −38% | |
Other biomass entries (Bi) | 160% | (−100%) | −60% | |
Chemical fertilizers (Fi) | 31% | −95% | (−100%) | |
Litterfall (LFi) | 357% | (−100%) | (−100%) | |
Rainfall (Ri) | 52% | (−100%) | −64% | |
Irrigation (Ii) | 210% | (−100%) | −61% | |
Soil weathering (Wi) | — | (−100%) | −14% | |
Symbiotic N fixation - cultivated legumes (Li) | 140% | — | — | |
Symbiotic N fixation - wild legumes (LWi) | 42% | — | — | |
Non-symbiotic N fixation (Oi) | 66% | — | — |
